An exciting new idea to protect our planet from global warming is gathering steam. At the recent United Nations climate talks in Peru, negotiators agreed to consider ending virtually all fossil fuel use by 2050.
This breakthrough proposal could help preserve a livable climate, but the alternative is grim: A recent U.N. report warned that global warming will cause mass wildlife extinctions and inflict terrible suffering on the world's poorest populations.
That's why we need an international agreement that keeps most dirty fossil fuels in the ground and helps developing nations embrace a clean-energy economy.
Dozens of countries support this revolutionary proposal, but the United States is holding back. As we move toward the Paris climate summit next year, U.S. negotiators -- led by Secretary of State John Kerry -- must take a strong stance against fossil fuels.
Please take action to urge Secretary Kerry to support the "zero by 2050" plan.
You've rightly noted that rising carbon pollution is putting our world on a course leading to tragedy. That's why I urge you to put the full backing of the United States behind a proposal that emerged during the Lima climate talks to end virtually all fossil fuel use by 2050.
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To protect our world from global warming's most dangerous effects, we need a strong international climate agreement that keeps most fossil fuels in the ground and gives developing nations the help they need to embrace a clean-energy economy. Emissions of planet-warming pollution must peak around 2020 and fall rapidly after that.
We've already committed to take such steps in the 1992 climate treaty signed by the United States and ratified by the U.S. Senate. We also promised to help developing nations transition to renewable energy sources.
Unless we keep those promises and support strong international action, global warming will threaten our food supplies, kill off countless plant and animal species, flood our coastal cities, and inflict horrific harm on millions of people around the planet.
The "zero by 2050" plan is critical to preserving a livable climate. Dozens of countries already support it, and a prominent group of Catholic bishops just urged a rapid end to virtually all fossil fuel use and a quick move to renewables.
Please back this vital proposal. As we head toward the critical Paris climate summit next year, help protect our world by supporting the "zero by 2050" plan.